CN202005119U - Conductive foam - Google Patents

Abstract

The utility model discloses a conductive foam is cotton, it includes a bubble cotton body, the periphery of bubble cotton body is wrapped and is equipped with a non-woven fabrics layer, and the surface on this non-woven fabrics layer is equipped with an electroplating conducting layer, the utility model relates to a rationally, its low cost, the shielding is effectual, convenient to use moreover, and the facilitate promotion is used. The conductive foam is applied to a sealed cavity with a conduction function, and can be tightly attached to the wall surface of a gap needing to be shielded after being compressed due to the excellent elasticity of the conductive foam, and the conductive electroplating conductive layer arranged outside the non-woven fabric layer reconnects a current disconnection point to form a micro-current circuit. When the electromagnetic waves touch the cavity wall, a part of the electromagnetic waves are reflected, and a part of the electromagnetic waves form current on the surface layer of the cavity wall, finally become heat and are absorbed. At the moment, the electromagnetic wave entering the cavity is greatly reduced, so that the electromagnetic attenuation effect is achieved.

Description

A conductive foam

technical field

The utility model belongs to the field of electromagnetic shielding, in particular to a low-cost conductive foam.

Background technique

With the development of electronic technology, the harm of electromagnetic radiation to the environment and human body is becoming more and more serious. How to reduce electromagnetic radiation has become a common concern of all countries in the world. In the specific EMC design, it is usually necessary to place conductive foam in the electronic product. On the one hand, the conductive foam is used to shield the electromagnetic waves generated when the circuit of the electronic product is working, and on the other hand, it can also reduce the influence of external electromagnetic waves on the operation of the electronic product itself. And it can export the generated static electricity to the outside world and prevent excessive static electricity.

There are many types of shielding products in the market, including metal products, polymer silicone rubber products filled with conductive particles, etc. Relatively speaking, the price of materials used in these products, the cost of manufacturing equipment are relatively high, the manufacturing process is relatively complicated, and the price of the products in the market is relatively high, which limits the use of such products in some applications that require similar functions of electromagnetic shielding and Applications on systems where costs must be controlled.

Utility model content

The purpose of the utility model is to provide a conductive foam with reasonable design, which is low in cost, good in shielding effect, easy to use, and easy to popularize and apply.

The technical scheme that the utility model adopts for realizing the above object is:

A conductive foam, which includes a foam body, the outer periphery of the foam body is covered with a non-woven fabric layer, and the outer surface of the non-woven fabric layer is provided with an electroplating conductive layer.

As a further improvement of the utility model, the non-woven fabric layer is fixed to the foam body by adhesion.

As a further improvement of the present utility model, it also includes an adhesive layer for pasting and fixing the conductive foam to other articles, and the adhesive layer is fixed on the electroplated conductive layer wrapped on the bottom surface of the foam body .

Low-cost conductive foam body foam is very common in the market. It is cheap and has very good elasticity. The outer periphery of the conductive foam body is covered with a non-woven fabric with high wear resistance and an electroplated conductive layer. The non-woven fabric is heated to a certain temperature by a coating machine and fixed on the outer periphery of the conductive foam body by hot-melt, thus forming the product, and an adhesive layer can be optionally provided at the same time. The conductive foam can be used directly, which is convenient to use and does not require any other auxiliary installation tools.

The conductive foam is applied to the sealed cavity with conduction performance. Due to the excellent elasticity of the conductive foam itself, after being compressed, it can be tightly attached to the gap wall at the place to be shielded, and it is conductive. The electroplated conductive layer located outside the non-woven fabric layer reconnects the current disconnection point into a micro-current path. When the electromagnetic wave hits the cavity wall, part of the electromagnetic wave is reflected, and part of the electromagnetic wave forms a current on the surface of the cavity wall. Finally, it becomes heat and is absorbed. At this time, the electromagnetic waves entering the cavity are greatly reduced, thereby achieving the effect of electromagnetic attenuation.

The beneficial effects of the utility model are: the utility model is reasonable in design, low in cost, good in shielding effect, convenient in use, and convenient for popularization and application.

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Embodiment: see Fig. 1, a kind of conductive foam of the present invention, it comprises a foam body 1, and the periphery of described foam body 1 is provided with a non-woven fabric layer 2, and the outer surface of this non-woven fabric layer 2 An electroplating conductive layer 3 is provided on the surface.

The non-woven fabric layer 2 is fixed to the foam body 1 by adhesion.

It also includes a back glue layer 4 for pasting and fixing the conductive foam to other articles, and the back glue layer 4 is fixed on the electroplated conductive layer 3 wrapped on the bottom surface of the foam body 1 .

The low-cost conductive foam body 1 is very common in the market, and its price is cheap and very good in elasticity. The outer periphery of the conductive foam body 1 is covered with a non-woven fabric with high wear resistance of an electroplated conductive layer 3, The non-woven fabric is heated to a certain temperature by a coating machine and fixed on the outer periphery of the conductive foam body 1 to form a non-woven fabric layer 2 , and an adhesive layer 4 can be optionally provided at the same time. The conductive foam can be used directly, which is convenient to use and does not require any other auxiliary installation tools.

The conductive foam is applied to the sealed cavity with conduction function. Due to the excellent elasticity of the conductive foam itself, after being compressed, it can be tightly attached to the wall of the gap where the shield needs to be shielded, and it is conductive. The electroplated conductive layer 3 located outside the non-woven fabric layer 2 reconnects the current disconnection point into a micro-current path. When the electromagnetic wave hits the cavity wall, part of the electromagnetic wave is reflected, and a part of the electromagnetic wave forms a current on the surface of the cavity wall. , and finally turned into heat and absorbed. At this time, the electromagnetic waves entering the cavity are greatly reduced, thereby achieving the effect of electromagnetic attenuation.

The utility model has the advantages of reasonable design, low cost, good shielding effect, convenient use and convenient popularization and application.

As described in the embodiment of the utility model, other conductive foams with the same or similar structure as the utility model are within the protection scope of the utility model.

Claims (3)

1. A conductive foam, which includes a foam body, characterized in that: the outer periphery of the foam body is covered with a non-woven fabric layer, and the outer surface of the non-woven fabric layer is provided with an electroplated conductive layer. 2. The conductive foam according to claim 1, characterized in that, the non-woven fabric layer is fixed to the foam body by adhesion. 3. The conductive foam according to claim 2, characterized in that, it also includes a back adhesive layer for pasting and fixing the conductive foam to other articles, and the adhesive layer is fixed to the foam wrapped around the foam. On the electroplated conductive layer at the bottom surface of the cotton body.

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